Sphygmomanometer.



C. R. WASER.

SPHYGMOMANOMETER.

APPLICATION FILED JULY 14, 1914.

1,164,895. Patented B91121, 1915.

cOLuMBlA PLANOGRAPH IO-,WASHINGTON. n. c.

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CARL R. WASER, OF PHILADELPHIA, PENNSYLVANIA, ASSIGNGR TO THE PRECISIONTHERMOMETER AND INSTRUMENT COMPANY, OF PHILADELPHIA, PENNSYLVANIA,

. A CORPORATION OF PENNSYLVANIA.

SPHYGMOIMNOMETER.

Application filed July 14, 1914.

a fixed section, a valve for closing the end of the fixed section toprevent the escape therefrom of the liquid used therein, and means forholding the valve in the desired position.

In the accompanyingdrawings, Figure 1 is an elevation of an instrumentembodying my invention with part of the scale broken away. 2 is anenlarged front elevation of a section of the same. Flg. 3 is an enlargedslde elevation of a section of the same.

' Fig. 4 is a top plan view of the tube sections in folded relation withthe valve seated on the end of the fixed tube section and a part of thelid shown. in section. Fig. 5 is a part sectional side elevation of asection of the constructionwith the elements in the relation occupied inFig. 4. Fig. 6 is a longitudinal. sectional view taken through the topof the fixed tube section and the valve seated thereon, and Fig. 7 is avertical longitudinal sectional view taken through the closed case withthe instrument folded therein.

In the form of the instrument illustrated in the drawing, the case 1 hasfixed to its hinged lid 2 the tube 3 provided with the branch 4, 5 and6, a stop cock 7 controlling communication between the parts 3 and 5 anda needle valve 8 controlling discharge from the part 3 through the part6. A pneumatic bulb or pump 9 is connected through the flexible tube 10with a nipple 11 which is engaged in the branch 5 and a pneumatic cuff12 is connected through the flexible tube 13 with a nipple 1% which isengaged in the branch 4. A cistern 15 has a neck 16 which is connectedby a coupling 17 with the tube '3, the bottom of the cistern beingconnected by a bend 18 with a tube section. 19 and the clip beingprovided with the forwardly pro- Specification of Letters Patent. 7

Patented Dec. 21, 1915.

Serial No. 850,891.

jecting bearings 23 and the rearwardly projecting bearings 24. A leatherring or gasket 25 is fixed on the open end of the section 19, beingengaged by the flange 26 turned in from the top of the clip 21 on theouter edge of the ring. A tube section 27 has fixed on the lower endthereof an open clipor shoe 28 provided with the forwardly projectingbearings 29 hinged to the bearings 23 by the pintles 30 and therearwardly projecting arm 31 adapted to engage a spring catch 32 fixedon the lid 2. A valve 33 is provided with the bearing 34 which is hingedbetween the bearings 24 by the pintle 35 passing therethrough, the valvebeing provided with the arm 36having the resilient lingers orbifurcations 37 adapted for engaging the section 27 and with the leatherwasher 38 adapted for engaging the leather ring 25. A spring 39 bearsagainst the valve 33, has the coils 40 on the pintle 35 and the ends 4:1fixed to the bearings 2-1, the spring acting to automatically close thevalve on the end of the tube section 19 when the tube section 27 hasbeen folded over and the valve arm 36 bearing on the adjacent end of thetube section to hold it in folded position.

A spring 43 is fastened to the bottom of the case 1 to frictionallyengage the valve arm 36, when the lid 2 with the instrument thereon isfolded down, the spring acting to securely hold the valve seated on theend of the section 19. In operation, the lid 2 is brought to theelevated position, the valve 33 and tube section 27 are turned to theposition shown in Figs. 1, 2 and 3, with the arm 31 engaged by the catch32 and the tube section thereby held seated on the gasket 25, the cuff12 is aflixed. the valve 7 is opened and the valve 8 closed, the pump 9is operated to force the mercury from the cistern 15 up the tubesections 19 and 27 until the pulse of the patient is obliterated, thevalve 7 is then closed and the valve 8 is opened and theneading of thescale 42 is taken when the pulse is observed. The open character of thefront of the clips 21 and 23 provides for continuity in the exposedfronts of the tube sections 19 and 27, permitting the surface of themercury to be observed substantially throughout its course.

Having described my invention, I claim 1. In a sphygmomanometer, atubehaving sectionsconnected in hinged relation so that they are adaptedto engage in reg stra tion and to fold relatively, 1n combination with avalve hinged on one of saidsections adapted'to'be turned to a positionexterior to said tube in the registeringrelation of its sections and toclose the section to which it is hin ed in the folded relation of theother.

2. In a sphygmomanometer, a tube hav- 1 ing sections PI'OVlClBCl withlunged clips on adjacent ends thereof, and a flap valve hinged on one ofsaid clips adapted to be moved to a position exterior to said sectionswhen in alinementor to be moved, to close an end of the section to whichit is hinged when the tube sections are in folled position. 7 3. Inasphygmomanometer, a tube-having sections provided with hinged clipshaving openings in alinement exposing registering ends of said tubesections and a valve hinged on one of said clips so that it can beturned to a position exterior to said sections in the registeringrelation thereof, said valv'ebeing adapted for closing an end of one ofsaid tube sections in the folded relation thereof.

4. In a sphygmomanometer, a tube having'a stationary section and asection movable into and out of registration with said stationarysection, in combination with a valve having a hinge exterior tosaid'tube whereby it is adapted to close said stationary section whensaid movable section is out of registration, and to be removable fromsaid sections to permit registration thereof, and means independent of'said valve for locking said sections in registration.

5. In a sphygmomanometer, a tube having sections connected in hingedrelation, a

flap valve adapted for closing an end ofone of said sections, means onsaid valve enga eol bythe other of said sections when the latter are inregistration, and means com prisinga spring for locking said sections inregistration.

6. In a sphygmomanometer, acase having a lid, a tube section fixed tothe lid,"a tube section hinged to the fixed tube section, a flap valvehaving a hinge exterior to the sections whereby it isadapted to closeone section in the folded position of the other,

and means carried by said case whereby said valve 1S held seated whensald lid 1s closed. f

7. In a sphygmomanometer, a case having a hinged lid, a tube sectionfixed within the lid, a tube section hinged to the fixed tube section soas to register therewith and fold thereon, a member on the movablesection and an interlocking stationary member for holding the movablemember in registration with the fixed member, a flap valve hingedexterior to thetube sections and adapted to close the end of thestationary section, and

means carried by the case for holding the valve on the end of the nxedsection.

8. In a sphygmomanometer, a case having mit one section to be turnedrelativelv to the I other stationary section, means for fixing thestationary section to the lid, a latch carried by thev lid, a devicecarried by the movable section for engaging the latch and holding thesections in registration, and a spring pressed valve having a turningaxis exterior to the tube and adapted-for closing the fixed section inthe folded position of the movable section, said valve having means forengaging an end of the folded section and holding it in folded position.

In testimony'whereof I aflix my signature in presence of two. witnesses.

' CARL R. NASERQ Witnesses: e

MARJORY D. GRAF. C. N. BUTLER.

( iopies of this patent may be obtained for five cents each, byaddressing the Commissioner of Patents, Washington, D. 0.

